Grinding machine



April 5, i949. J, A, RlLEY 2,466,478

GRINDING MACHINE Filed March 13, 1946 v 3 Sheets sheet l FIGJ;

' 72 64 48 'EF' 2- .55 6 A :mlll-llhumfman 62 @Ilv //4 m y m 4 INVENTOR.

'JAMES A. RILEY Bv Mya/Wy@ ATI'D RN EYE pril 5,1949. l J, A RILEY 2,466,478

GRINDING MACHINE FiledvMarch 13, 1946' 3 Sheets-Sheet 2 ATTE! R N EYS J- A. RILEY GRINDING MACHINE April s, 1949.

3 Sheets-Sheet 3 Y Filed March 13, 1946 INVENTOR.

' AT'rClRNEYS Patented Apr. 5, 1949 UNH'E'ED STATE iel'blbl'l'f QFEICE GRINDING MACHINE J ames A. Riley, Hillsdale, Mich.

Application March 13, 1946, Serial No. 654,091

(Cl. 51-l03) 1 claim. i

This invention. relates to improvements in grinding machines and particularly to improvements in centerless grinders.

An object of the invention is to provide a machine for grinding `two or more diameters of a work piece.

Another object of the invention is to provide a machine which will prevent undue wear of the regulating wheel.

A further object of the invention is to provide a machine wherein a revolving bed is provided for the regulating wheel whereby the regulating wheel can be adjusted at any angle with relation to the article being worked on.

With the foregoing and other objects and advantages in view the invention consists of the details of construction, arrangement and combination of parts more fully hereinafter described, claimed and illustrated in the accompanying drawings in which:

Figure 1 is an elevational View of an embodiment of the invention.

Figure 2 is a top plan view thereof.

Figure 3 is a detailed view of the machine in use at an angle to that shown in Figure 2.

Figure l is a sectional View on the line ll-ll of Figure 2.

Figure 5 is a sectional View on the line 5-5 of Figure 6.

Figure 6 is a detailed view of the bedfor the regulating wheel.

Figure '7 is a sectional View on the line 7--7 of Figure 8.

Figure 8 is a plan view of the circular plate mounted on the bed shown in Figure 6.

Figure 9 is an end view of the work rest.

Figure 1.0 is atop plan view thereof.

Figure 11 is a side view of the work rest, and

Figure 12 is detailed fragmentary View of the regulating wheel and grinding wheel in position to grind a part.

Referring more in detail to the drawings the reference numeral 2li designates the machine comprising a bed 22, having rising therefrom at one end a pedestal bearing 24 in which is journalled a spindle and motor 25 for a grinding wheel 25. The wheel 26 is protected by a guard or housing 28 and the grinding wheel rotates in a clockwise direction.

The upper surface of the bed 22 is provided with guideways Sil for an adjustable bed plate 32, shiftable longitudinally of the bed 22 toward or away from the grinding wheel 26 and the bed plate 32 is provided with guideways 3d for a bed plate 3E which is shiftable longitudinally of the beds 22 and 32 by means of an adjusting screw 33 rotatably journalled in a bracket v4l) secured to the outer of the bed 22 by bolts '42. The screw 36 threaded adjustment with va boss or lug lli mounted on the outer end of -the'bed 35, and a hand wheel i6 on the outer end of the screw 38 eifects rotation thereof, also mounted on the screw 38 adjacent the boss i4 is the locking control lever i8 for locking the bed 36 in p0- sition after it has been adjusted by the wheel 46.

The bed 36 is provided with a circular guideway 5t to mount the circular plate "52 thereon and elongated slots 54 in the plate adjacent Athe periphery and diametrically opposed to each other permit oscillation of the plate 52 which'is limited by the bolts 55 passing through the Slots Ell and receivable in the bed 36.

The plate 52 is provided with a pointer -56 which coacting Awith the graduated segmental scale 5l on the bed `:it indicates the degree of oscillation of the plate 52.

The rear of the plate 52 is provided ywith an apertured arm 58 to receive the .adjusting screw Bil which is pivotally mounted on the bed 36 by means of the U-shaped rblock 62 secured to the bed 36. Nuts 63 on the screw 60 permit movement of the plate 52 either to the right or left by the adjustment thereof.

The plate 52 is provided with transverse guideways Bil to mount the L-shaped head plate 66 on which is secured the L-shaped bracket post housing 68 by means of the tilt bolt 'I0 and center pin 12. The tilt bolt being mounted in the arcuate slot 'lll in the plate 66 and all the plates are provided with dovetails 'l5 to fit the guideways on the superpcsed bed and plates.

Mounted on the housing 68 for transverse movement thereof is the block 16 which mounts the diamond post and screw 'F3 and movement of the block i6 is accomplished by means of the screw journalled in upstanding opposed lugs 82 on the housing 63, a hand wheel 84 causes oscillation of block i6 and post 'I8 by means of the slot S6 in the housing 68.

Formed integral with the side 88 of the housing t8 is the motor support 90 in which is journalled the shaft Q2 of the regulating wheel 94 and multiple pulleys 96 on the shaft 92 have driving connection with the pulleys 98 on the motor shaft me of the motor |112 by means of belts lili and the motor 402 is mounted on the support 96 by means of adjustable brackets |06 by which means the motor can be raised or lowered as desired to tighten the belts Ill and the motor is provided with a speed control |03 and 3 the pulleys and belts with a protective housing |09.

Mounted intermediately of the grinding Wheel 25 and regulating wheel 94 is the Work rest |||l having flanges ||2 to receive bolts ||4 which are mounted in the slots I6 and nuts I on the bolts ||4 to tighten the rest to the bed 32 in slots H8.

The rest is provided with a center pin and the uprights |22 are slotted at |23 to receive the part |24 which is secured in place by the bolt |26.

The part |24 can be any suitable part on which it is desired to Work.

In Figure 12 the grinding Wheel is shown with a taper and the regulating Wheel has been adjusted so that it is parallel With the taper of the grinding wheel. Thus the regulating Wheel Will need no taper and the part worked on is in proper position for grinding. There is no slipping between the part and the wheels and the part will stay rm.

It can be seen that the bed plates can be adjusted longitudinally as well as the Work rest and the regulating wheel can be oscillated to the right and left thus eliminating grinding of tapers on the regulating wheel and saving of the diamond in the post 18, thereby providing a more efficient type of grinder which can be more easily adjusted without the use of shims and a saving of parts.

It is believed that the operation of the grinder will be apparent to those skilled in the art and it is to be understood that changes in the details of construction, arrangement and combination of parts may be resorted to without departing from the spirit of the invention and the scope of the appended claim.

Having thus described the invention what is claimed as new and desired to be secured by Letters Patent is:

Means for supporting the regulating wheel Ahousing of a centerless grinder for adjustment about a vertical axis and for adjustment horizontally with relation to said vertical axis comprising, a rst bed plate which is adjustable horizontally with relation to the vertical axis, a second bed plate mounted on said rst bed plate and adjustable along the same horizontal axis, operative means between said rst and second bed plate to retain said bed plates in adjustable relation to each other, a third circular bed plate mounted on said second bed plate for oscillatory adjustment about the vertical axis, operative means between said second and third said bed plates to retain said bed plates in adjustable relation to each other, a feed screw connected to said second and third bed plates for adjustment of said third bed plate in relation to said second bed plate, means on said feed screw for retaining said plates in adjusted relation to each other, and L-shaped head plate mounted on said third bed plate for adjustment along the horizontal axis, said housing being mounted on said head plate and motor means carried by said housing for causing the rotation of said regulating wheel, and said bed plates permitting adjustment with relation to the angularity of the grinding means of said centerless grinder.

JAMES A. RLE'Y.

REFERENCES CITED The following references are of record in the :tile of this patent:

UNITED STATES PATENTS Number Name Date 1,611,135 Sanford Dec. 14, 1926 1,722,386 Norton July 30, 1929 1,845,865 Einstein et al Feb. 16, 1932 FOREIGN PATENTS Number Country Date 248,893 Great Britain Mar. 18, 1926 

